I want to know how to avoid following. when I viewing the data, the data are not tallying as they should be due to missing levels. what should I do?
x <- c(2, 3, 4, 4, 4)
a <- factor(x)
levels(a) <- c("A", "B", "C", "D", "E")
a
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Use the droplevels – akrun Oct 16 '17 at 12:12
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Please, someone, answer my question quickly as possible. – Bandara Rathnathilaka Oct 16 '17 at 12:12